Mask Compressibility

[Choque]

so i've read good stuff about the sphera. i think someone calculated that you could go down to ~46m without equalizing the mask.
since i'm kinda new to freediving, i was wondering if someone has actual field-tested numbers.
i'm especially interested in how deep you can go with the omer alien and aqualung micromask without equalizing them

greetings,
chris

 

[trux]

Sphera is compressible well too, but the 46m were calculated by myself at the Sommap Flow mask in this thread, also reported in http://forums.deeperblue.com/freediving-equipment/79855-mask-internal-volume-database.html

I tested it to 29m only (did not have any bigger depth at that time anywhere close), and I pinched my nose to avoid that I compensate it involuntarily, which is otherwise practically inavoidable. Worked well.

I also own the Mikromask. It is an excellent mask, but the compressibility is very limited, since already in normal state the glass is very close to the eyes. It means you have to compensate it frequently, and already at small depths (4-5m). On the other hand, it has low volume, so it is not a big problem.